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  1. <!DOCTYPE html>
    2. 

  2. 

  3. <head>
    4. 

  4.     <!-- <link async rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css"
    5. 

  5.         integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous"> -->
    6. 

  6.     <script type="text/javascript" src="../js/jquery.min.js" crossorigin="anonymous"></script>
    7. 

  7.     <link rel="stylesheet" href="../css/bootstrap.min.css" crossorigin="anonymous">
    8. 

  8.     <script type="text/javascript" src="../js/bootstrap.min.js" crossorigin="anonymous"></script>
    9. 

  9.     <link rel="stylesheet" href="../css/style.css">
    10. 

  10.     <link rel="preconnect" href="https://fonts.gstatic.com">
    11. 

  11.     <link href="https://fonts.loli.net/css2?family=Anonymous+Pro:ital,wght@0,400;0,700;1,400;1,700
    12. 

  12. &family=Noto+Serif+SC:wght@300;400;500;600;700&display=swap" rel="stylesheet">
    13. 

  13.     <title>化学</title>
    14. 

  14.     <style>
    15. 

  15.         .well {
    16. 

  16.             padding: 10px;
    17. 

  17.             border: 1px solid rgb(173, 173, 173);
    18. 

  18.             background-color: #f5f5f5;
    19. 

  19.             margin-top: 5px;
    20. 

  20.             min-height: 160px;
    21. 

  21.             border-radius: 5px;
    22. 

  22.             width: 100%;
    23. 

  23.             overflow-x: auto;
    24. 

  24.             overflow-y: auto;
    25. 

  25.         }
    26. 

  26.         .btn:focus,.btn:focus-visible,.btn:focus-within,.btn:active{
    27. 

  27.             outline: 10px double rgba(95, 177, 221, 0.5);
    28. 

  28.         }
    29. 

  29.         .btn.disabled {
    30. 

  30.             cursor: default;
    31. 

  31.             pointer-events: none;
    32. 

  32.         }
    33. 

  33.     </style>
    34. 

  34.     <script id="MathJax-script" src="https://cdn.bootcss.com/mathjax/3.0.5/es5/tex-mml-chtml.js"></script>
    35. 

  35.     <!-- <script src="https://apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js"></script> -->
    36. 

  36.     <script>
    37. 

  37.         var list = ['',
    38. 

  38.             'H', 'He',
    39. 

  39.             'Li', 'Be', 'B', 'C', 'N', 'O', 'F', 'Ne',
    40. 

  40.             'Na', 'Mg', 'Al', 'Si', 'P', 'S', 'Cl', 'Ar',
    41. 

  41.             'K', 'Ca', 'Sc', 'Ti', 'V', 'Cr', 'Mn', 'Fe', 'Co', 'Ni', 'Cu', 'Zn', 'Ga', 'Ge', 'As', 'Se', 'Br', 'Kr',
    42. 

  42.             'Rb', 'Sr', 'Y', 'Zr', 'Nb', 'Mo', 'Tc', 'Ru', 'Rh', 'Pd', 'Ag', 'Cd', 'In', 'Sn', 'Sb', 'Te', 'I', 'Xe',
    43. 

  43.             'Cs', 'Ba', 'La', 'Ce', 'Pr', 'Nd', 'Pm', 'Sm', 'Eu', 'Gd', 'Tb', 'Dy', 'Ho', 'Er', 'Tm', 'Yb', 'Lu', 'Hf', 'Ta', 'W', 'Re', 'Os', 'Ir', 'Pt', 'Au', 'Hg', 'Tl', 'Pb', 'Bi', 'Po', 'At', 'Rn',
    44. 

  44.             'Fr', 'Ra', 'Ac', 'Th', 'Pa', 'U', 'Np', 'Pu', 'Am', 'Cm', 'Bk', 'Cf', 'Es', 'Fm', 'Md', 'No', 'Lr', 'Rf', 'Db', 'Sg', 'Bh', 'Hs', 'Mt', 'Ds', 'Rg', 'Cn', 'Nh', 'Fl', 'Mc', 'Lv', 'Ts', 'Og'
    45. 

  45.         ]
    46. 

  46.         var weighList = {
    47. 

  47.             'H': 1, 'He': 4,
    48. 

  48.             'Li': 7, 'Be': 9, 'B': 11, 'C': 12, 'N': 14, 'O': 16, 'F': 19, 'Ne': 20,
    49. 

  49.             'Na': 23, 'Mg': 24, 'Al': 27, 'Si': 28, 'P': 31, 'S': 32, 'Cl': 35.5, 'Ar': 40,
    50. 

  50.             'K': 39, 'Ca': 40, 'Sc': 45, 'Ti': 48, 'V': 51, 'Cr': 52, 'Mn': 55, 'Fe': 56, 'Co': 59, 'Ni': 59, 'Cu': 63.5, 'Zn': 65.5, 'Ga': 70, 'Ge': 72.5, 'As': 75, 'Se': 79, 'Br': 80, 'Kr': 84,
    51. 

  51.             'Rb': 85.5, 'Sr': 87.5, 'Y': 89, 'Zr': 91, 'Nb': 93, 'Mo': 96, 'Tc': 99, 'Ru': 101, 'Rh': 103, 'Pd': 106.5, 'Ag': 108, 'Cd': 112.5, 'In': 115, 'Sn': 118.5, 'Sb': 122, 'Te': 127.5, 'I': 127, 'Xe': 131,
    52. 

  52.             'Cs': 133, 'Ba': 137, 'La': 139, 'Ce': 140, 'Pr': 141, 'Nd': 144, 'Pm': 147, 'Sm': 150.5, 'Eu': 152, 'Gd': 157, 'Tb': 159, 'Dy': 162.5, 'Ho': 165, 'Er': 167, 'Tm': 169, 'Yb': 173, 'Lu': 175, 'Hf': 178.5, 'Ta': 181, 'W': 184, 'Re': 186, 'Os': 190, 'Ir': 192, 'Pt': 195, 'Au': 197, 'Hg': 200.5, 'Tl': 204.5, 'Pb': 207, 'Bi': 209, 'Po': 209, 'At': 210, 'Rn': 222,
    53. 

  53.             'Fr': 223, 'Ra': 226, 'Ac': 227, 'Th': 232, 'Pa': 231, 'U': 238, 'Np': 237, 'Pu': 244, 'Am': 243, 'Cm': 247, 'Bk': 247, 'Cf': 251, 'Es': 252, 'Fm': 257, 'Md': 258, 'No': 259, 'Lr': 260, 'Rf': 261, 'Db': 262, 'Sg': 263, 'Bh': 262, 'Hs': 265, 'Mt': 266, 'Ds': 269, 'Rg': 272, 'Cn': 285, 'Nh': 284, 'Fl': 289, 'Mc': 288, 'Lv': 293, 'Ts': 291, 'Og': 294
    54. 

  54.         }
    55. 

  55.         var weighList2 = {
    56. 

  56.             'H': 1.008, 'He': 4.003,
    57. 

  57.             'Li': 6.941, 'Be': 9.012, 'B': 10.81, 'C': 12.01, 'N': 14.01, 'O': 16.00, 'F': 19.00, 'Ne': 20.18,
    58. 

  58.             'Na': 22.99, 'Mg': 24.31, 'Al': 26.98, 'Si': 28.09, 'P': 30.97, 'S': 32.07, 'Cl': 35.45, 'Ar': 49.95,
    59. 

  59.             'K': 39.10, 'Ca': 40.08, 'Sc': 44.96, 'Ti': 47.87, 'V': 50.94, 'Cr': 52.00, 'Mn': 54.94, 'Fe': 55.85, 'Co': 58.93, 'Ni': 58.69, 'Cu': 63.55, 'Zn': 65.39, 'Ga': 79.72, 'Ge': 72.61, 'As': 74.92, 'Se': 78.96, 'Br': 79.90, 'Kr': 83.80,
    60. 

  60.             'Rb': 85.47, 'Sr': 87.62, 'Y': 88.91, 'Zr': 91.22, 'Nb': 92.91, 'Mo': 95.94, 'Tc': 99, 'Ru': 101.1, 'Rh': 102.9, 'Pd': 106.4, 'Ag': 107.9, 'Cd': 112.4, 'In': 114.8, 'Sn': 118.7, 'Sb': 121.8, 'Te': 127.6, 'I': 126.9, 'Xe': 131.3,
    61. 

  61.             'Cs': 132.9, 'Ba': 137.3, 'La': 138.9, 'Ce': 140.1, 'Pr': 140.9, 'Nd': 144.2, 'Pm': 147, 'Sm': 150.4, 'Eu': 152.0, 'Gd': 157.3, 'Tb': 158.9, 'Dy': 162.5, 'Ho': 164.9, 'Er': 167.3, 'Tm': 168.9, 'Yb': 173.0, 'Lu': 175.0, 'Hf': 178.5, 'Ta': 180.9, 'W': 183.8, 'Re': 186.2, 'Os': 190.2, 'Ir': 192.2, 'Pt': 195.1, 'Au': 197.0, 'Hg': 200.6, 'Tl': 204.4, 'Pb': 207.2, 'Bi': 209.0, 'Po': 209, 'At': 210, 'Rn': 222,
    62. 

  62.             'Fr': 223, 'Ra': 226.0, 'Ac': 227.0, 'Th': 232.0, 'Pa': 231.0, 'U': 238.0, 'Np': 237.0, 'Pu': 244, 'Am': 243, 'Cm': 247, 'Bk': 247, 'Cf': 251, 'Es': 252, 'Fm': 257, 'Md': 258, 'No': 259, 'Lr': 260, 'Rf': 261, 'Db': 262, 'Sg': 263, 'Bh': 262, 'Hs': 265, 'Mt': 266, 'Ds': 269, 'Rg': 272, 'Cn': 285, 'Nh': 284, 'Fl': 289, 'Mc': 288, 'Lv': 293, 'Ts': 291, 'Og': 294
    63. 

  63.         }
    64. 

  64. 

  65.         var bracket = {}
    66. 

  66. 

  67.         function getco(str) {
    68. 

  68.             var n = str.length, ret = 0
    69. 

  69.             for (var i = 0; i < n; i++) {
    70. 

  70.                 var ch = str.charAt(i)
    71. 

  71.                 if (isNaN(ch)) break;
    72. 

  72.                 ret *= 10;
    73. 

  73.                 ret += ch - 0;
    74. 

  74.             }
    75. 

  75.             str = str.slice(i, n)
    76. 

  76.             return [ret, str, i]
    77. 

  77.         }
    78. 

  78. 

  79.         function workMolecule(str, st) {
    80. 

  80.             // console.log(str, st)
    81. 

  81.             var n = str.length, co = 1, ans = {};
    82. 

  82.             for (let i = 0; i < n; i++) {
    83. 

  83.                 var ch = str.charAt(i)
    84. 

  84.                 var f = {}
    85. 

  85.                 if (ch == '(') {
    86. 

  86.                     f = workMolecule(str.slice(i + 1, bracket[i + st] - st), st + i + 1)
    87. 

  87.                     i = bracket[i + st] - st;
    88. 

  88.                 } else if ('A' <= ch && ch <= 'Z') {
    89. 

  89.                     if (i + 1 < n) {
    90. 

  90.                         let nch = str.charAt(i + 1)
    91. 

  91.                         if ('a' <= nch && nch <= 'z') i++, ch += nch
    92. 

  92.                     }
    93. 

  93.                     if (f[ch]) f[ch]++;
    94. 

  94.                     else f[ch] = 1;
    95. 

  95.                 } else return {}
    96. 

  96.                 let g = getco(str.slice(i + 1, n))
    97. 

  97.                 if (g[0]) {
    98. 

  98.                     for (key in f) {
    99. 

  99.                         f[key] *= g[0]
    100. 

  100.                     }
    101. 

  101.                 }
    102. 

  102.                 for (key in f) {
    103. 

  103.                     if (ans[key]) ans[key] = ans[key] + f[key]
    104. 

  104.                     else ans[key] = f[key]
    105. 

  105.                 }
    106. 

  106.                 i += g[2]
    107. 

  107.             }
    108. 

  108.             // console.log('ans', ans)
    109. 

  109.             return ans;
    110. 

  110.         }
    111. 

  111. 

  112.         function parseMolecule(str) {
    113. 

  113.             str = str.replace(/[\[{]/g, "(").replace(/[\]}]/g, ")")
    114. 

  114.             str = str.replace(/<\d*e[\+\-]>*/g, "");
    115. 

  115.             // console.log('Parsing molecule', str)
    116. 

  116.             var n = str.length, co = 1, stack = [], top = 0;
    117. 

  117.             for (let i = 0; i < n; i++) {
    118. 

  118.                 var ch = str.charAt(i);
    119. 

  119.                 if (ch == '(') stack[top] = i, top++;
    120. 

  120.                 else if (ch == ')') bracket[stack[top - 1]] = i, bracket[i] = stack[top - 1], top--;
    121. 

  121.                 if (top < 0) return {}
    122. 

  122.             }
    123. 

  123.             if (top != 0) return {};
    124. 

  124.             var g = getco(str)
    125. 

  125.             if (g[0]) co = g[0]
    126. 

  126.             var f = workMolecule(g[1], g[2])
    127. 

  127.             for (key in f) {
    128. 

  128.                 f[key] *= co;
    129. 

  129.             }
    130. 

  130.             return f;
    131. 

  131.         }
    132. 

  132. 

  133.         function weigh(hash, mode = 0) {
    134. 

  134.             var ans = 0
    135. 

  135.             if (mode) {
    136. 

  136.                 for (key in hash) {
    137. 

  137.                     if (weighList2[key]) ans += hash[key] * weighList2[key]
    138. 

  138.                 }
    139. 

  139.             } else {
    140. 

  140.                 for (key in hash) {
    141. 

  141.                     if (weighList[key]) ans += hash[key] * weighList[key]
    142. 

  142.                 }
    143. 

  143.             }
    144. 

  144.             return parseInt(ans * 10000) / 10000;
    145. 

  145.         }
    146. 

  146.         function weighEquation(str, mode = 0) {
    147. 

  147.             str = str.replace(/<\d*e[\+\-]>*/g, "").replace(/[^\dA-Za-z<>\(\)\+\-=\.]/g, "");
    148. 

  148.             var q = str.split(/[=\+\-\.]/g)
    149. 

  149.             var p = str.replace(/[^=\+\-\.]/g, "").replace('.', '*')
    150. 

  150.             var ans = ""
    151. 

  151.             if (str == "") return ""
    152. 

  152.             var n = p.length, sum = 0, gsum = "";
    153. 

  153.             for (let i = 0; i <= n; i++) {
    154. 

  154.                 var k = weigh(parseMolecule(q[i]), mode)
    155. 

  155.                 sum += k
    156. 

  156.                 if (p.charAt(i) == '=') gsum += parseInt(sum * 10000) / 10000 + '=', sum = 0;
    157. 

  157.                 ans = ans + k + p.charAt(i)
    158. 

  158.             }
    159. 

  159.             if (n) ans += '\\)<br>\\(' + gsum + parseInt(sum * 10000) / 10000
    160. 

  160.             return ans.replace('\*', "\\cdot");
    161. 

  161.         }
    162. 

  162. 

  163.         function parseEquation(str) {
    164. 

  164.             str = str.replace(/ /g, '')
    165. 

  165.             var q = str.split(/[=\+\-\.]/g)
    166. 

  166.             var p = str.replace(/[^=\+\-\.]/g, "")
    167. 

  167.             var ans = {}
    168. 

  168.             var n = p.length;
    169. 

  169.             for (let i = 0; i <= n; i++) {
    170. 

  170.                 var f = parseMolecule(q[i])
    171. 

  171.                 for (key in f) {
    172. 

  172.                     if (ans[key]) ans[key] = ans[key] + f[key]
    173. 

  173.                     else ans[key] = f[key]
    174. 

  174.                 }
    175. 

  175.             }
    176. 

  176.             return ans
    177. 

  177.         }
    178. 

  178. 

  179.         function renderEquation(str) {
    180. 

  180.             str = str.replace(/[\[{]/g, "(").replace(/[\]}]/g, ")");
    181. 

  181.             str = str.replace(/[^\dA-Za-z<>\(\)\+\-=\.]/g, "");
    182. 

  182.             // console.log('Rendering equation', str)
    183. 

  183.             str = str.replace(/([A-Za-z]+)/g, "\\text{$1}");
    184. 

  184.             str = str.replace(/<(\d*)\\text\{e\}([\+\-])>/g, "^{$1$2}");
    185. 

  185.             str = str.replace(/([\}\)])(\d+)/g, "$1_{$2}");
    186. 

  186.             str = str.replace('.', "\\cdot");
    187. 

  187.             // console.log(str)
    188. 

  188.             return str
    189. 

  189.         }
    190. 

  190. 

  191.         var mode = 'bal', balInput, balText = '', inputText
    192. 

  192.         $().ready(function () {
    193. 

  193.             balInput = $("#balInput")[0]
    194. 

  194.             setBal();
    195. 

  195.             $("#balInput").keydown(function (e) {
    196. 

  196.                 if (e.keyCode == 13 && mode == 'bal') {
    197. 

  197.                     $("#balBtn")[0].click();
    198. 

  198.                 }
    199. 

  199.             });
    200. 

  200.             $(function () { $("[data-toggle='tooltip']").tooltip(); });
    201. 

  201.         })
    202. 

  202.         function setBal() {
    203. 

  203.             $('#frame')[0].innerHTML = '\\(' + renderEquation(balText) + '\\)';
    204. 

  204.             MathJax.typeset()
    205. 

  205.             $('#balBtn').text('配平')
    206. 

  206.             $('#balShare').removeClass('disabled')
    207. 

  207.             $('#balInput').attr('placeholder', 'CrI3+Cl2+KOH=K2CrO4+KIO4+KCl+H2O')
    208. 

  208.             $('#balBtn').attr('href', '/chem?CrI3+Cl2+KOH=K2CrO4+KIO4+KCl+H2O')
    209. 

  209.             $('#balBtn').removeClass('disabled')
    210. 

  210.             mode = 'bal'
    211. 

  211.             input()
    212. 

  212.         }
    213. 

  213.         function setWeigh() {
    214. 

  214.             $('#balBtn').text('相对质量')
    215. 

  215.             $('#balShare').addClass('disabled')
    216. 

  216.             $('#balInput').attr('placeholder', 'CH3CHO+2Ag(NH3)2OH=CH3COONH4+2Ag+3NH3+H2O')
    217. 

  217.             $('#balBtn').attr('href', '')
    218. 

  218.             $('#balBtn').addClass('disabled')
    219. 

  219.             mode = 'weigh'
    220. 

  220.             input()
    221. 

  221.         }
    222. 

  222.         function setWeigh2() {
    223. 

  223.             $('#balBtn').text('相对质量*')
    224. 

  224.             $('#balShare').addClass('disabled')
    225. 

  225.             $('#balInput').attr('placeholder', 'CH3CHO+2Ag(NH3)2OH=CH3COONH4+2Ag+3NH3+H2O')
    226. 

  226.             $('#balBtn').attr('href', '')
    227. 

  227.             $('#balBtn').addClass('disabled')
    228. 

  228.             mode = 'weigh2'
    229. 

  229.             input()
    230. 

  230.         }
    231. 

  231.         function input() {
    232. 

  232.             inputText = balInput.value
    233. 

  233.             if (mode == 'bal') {
    234. 

  234.                 $('#frame')[0].innerHTML = '\\(' + renderEquation((inputText == '') ? 'CrI3+Cl2+KOH=K2CrO4+KIO4+KCl+H2O' : inputText) + '\\)<br>'
    235. 

  235.                     + '<span class="glyphicon glyphicon-chevron-down" aria-hidden="true"></span><br>' + ((balText != '') ? ('\\(' + renderEquation(balText) + '\\)') : ('...'));
    236. 

  236.                 MathJax.typeset()
    237. 

  237.             } else if (mode == 'weigh') {
    238. 

  238.                 $('#frame')[0].innerHTML = '\\(' + renderEquation((inputText == '') ? 'CH3CHO+2Ag(NH3)2OH=CH3COONH4+2Ag+3NH3+H2O' : inputText) + '\\)<br>\\('
    239. 

  239.                     + weighEquation((inputText == '') ? '2CrI3+27Cl2+64KOH=2K2CrO4+6KIO4+54KCl+32H2O' : inputText) + '\\)';
    240. 

  240.                 MathJax.typeset()
    241. 

  241.             } else if (mode == 'weigh2') {
    242. 

  242.                 $('#frame')[0].innerHTML = '\\(' + renderEquation((inputText == '') ? 'CH3CHO+2Ag(NH3)2OH=CH3COONH4+2Ag+3NH3+H2O' : inputText) + '\\)<br>\\('
    243. 

  243.                     + weighEquation((inputText == '') ? '2CrI3+27Cl2+64KOH=2K2CrO4+6KIO4+54KCl+32H2O' : inputText, 1) + '\\)';
    244. 

  244.                 MathJax.typeset()
    245. 

  245.             }
    246. 

  246.         }
    247. 

  247.         var running;
    248. 

  248.         function balance() {
    249. 

  249.             if (running) return;
    250. 

  250.             $('#balBtn').text('配平...')
    251. 

  251.             $('#balBtn').addClass('disabled')
    252. 

  252.             running = 1;
    253. 

  253.             $.get('/chem?' + ((inputText == '') ? 'CrI3+Cl2+KOH=K2CrO4+KIO4+KCl+H2O' : inputText), function (e) {
    254. 

  254.                 $('#frame')[0].innerHTML = (e.charAt(0) == '!') ? ('<pre class="text-danger bg-danger">' + e.slice(1, e.length) + '</pre>') : ('\\(' + renderEquation((inputText == '') ? 'CrI3+Cl2+KOH=K2CrO4+KIO4+KCl+H2O' : inputText)
    255. 

  255.                     + '\\)<br><span class="glyphicon glyphicon-chevron-down" aria-hidden="true"></span><br>' + '\\(' + renderEquation(e) + '\\)');
    256. 

  256.                 if (e.charAt(0) != '!') balText = e
    257. 

  257.                 MathJax.typeset()
    258. 

  258.                 $('#balBtn').text('配平')
    259. 

  259.                 $('#balBtn').removeClass('disabled')
    260. 

  260.                 running = 0;
    261. 

  261.             })
    262. 

  262.         }
    263. 

  263.         function balUp() {
    264. 

  264.             $('#balInput').val(balText)
    265. 

  265.         }
    266. 

  266.     </script>
    267. 

  267. 

  268. </head>
    269. 

  269. 

  270. <body>
    271. 

  271.     <div>
    272. 

  272.         <div class="col-lg-8 col-md-10 col-xs-12">
    273. 

  273.             <div class="input-group">
    274. 

  274.                 <span class="input-group-btn">
    275. 

  275.                     <button type="button" class="btn btn-default" onclick="balUp()" id="balShare" title="导入配平结果"> <span class="glyphicon glyphicon-share-alt"
    276. 

  276.                             aria-hidden="true"></span></button>
    277. 

  277.                 </span>
    278. 

  278.                 <input id="balInput" type="text" class="form-control" oninput="input()">
    279. 

  279.                 <span class="input-group-btn">
    280. 

  280.                     <button type="button" class="btn btn-default" onclick="balance()" id="balBtn">配平</button>
    281. 

  281.                     <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
    282. 

  282.                         <span class="caret"></span>
    283. 

  283.                         <span class="sr-only">切换下拉菜单</span>
    284. 

  284.                     </button>
    285. 

  285.                     <ul class="dropdown-menu" role="menu">
    286. 

  286.                         <li class="dropdown-header">功能</li>
    287. 

  287.                         <li><a href="#" onclick="setBal()">配平</a></li>
    288. 

  288.                         <li><a href="#" onclick="setWeigh()">相对质量</a></li>
    289. 

  289.                         <li><a href="#" onclick="setWeigh2()" data-toggle="tooltip" data-placement="left"
    290. 

  290.                                 title="四位有效数字">相对质量*</a></li>
    291. 

  291.                         <li class="divider"></li>
    292. 

  292.                         <li><a href="/chemist" data-toggle="tooltip" data-placement="left" title="将打开新页面">配不下了</a>
    293. 

  293.                         </li>
    294. 

  294.                         <li class="divider"></li>
    295. 

  295.                         <li><a href="#" data-toggle="tooltip" data-placement="left" title="将会对所有人可见">发送到数据库</a></li>
    296. 

  296.                     </ul>
    297. 

  297.                 </span>
    298. 

  298.             </div>
    299. 

  299.             <div class="well" id="frame">
    300. 

  300.             </div>
    301. 

  301.         </div>
    302. 

  302.     </div>
    303. 

  303. </body>
    304. 

  304. 

  305. </html>
    306.